The toxicity level of Zn (mg/kg) in plants suggested by some workers is___________________?
A. > 50 mg kg-1
B. > 10 mg-1
C. > 400 mg kg-1
D. None of these
Agriculture Mcqs
The exact formula for calculating the base saturation percentage is_____________________?
The exact formula for calculating the base saturation percentage is_____________________?
A. Bas saturation percentage = CA+Mg+Na / CEC x 100
B. Bas saturation percentage = /CEC / CA+Mg+Na x 100
C. Bas saturation percentage = /CEC / CA+Mg x 100
D. None of the above
The EC: SAR and RSC values suggested by WAPDA for 3rd class irrigation water(C,S,R,) are____________________?
The EC: SAR and RSC values suggested by WAPDA for 3rd class irrigation water(C,S,R,) are____________________?
A. ECi:<1.5, SAR < 10 & RSC< 2.5
B. ECi:>1.5, SAR > 10 & RSC> 2.5
C. ECi:>1.5, SAR 2.5
D. Both a & b
According to WAPDA, the ECe of the salt free soil should remain__________________?
According to WAPDA, the ECe of the salt free soil should remain__________________?
A. < 4 dsm-1
B. Equal to 4 dsm-1
C. 4-8 dsm-1
D. None of the above
The exact chemical formula of DAP fertilizer is___________________?
The exact chemical formula of DAP fertilizer is___________________?
A. (NH2) HPO4
B. NH4H2PO4
C. NH4H2PO4
D. Both a & c
Nitrification is the microbial conversion of____________________?
Nitrification is the microbial conversion of____________________?
A. NH nitrogen the NO3 nitrogen in soil
B. NO2 to NO3 nitrogen in soil
C. NO3 nitrogen to NH4 + in soil
D. None of the above
Radiation can be detected by the blankening of photographic film or by using___________________?
Radiation can be detected by the blankening of photographic film or by using___________________?
A. Ratio autoanalyser
B. GM counter
C. Neutron probe
D. Dosimeter
The complex fertilizer Nitrophos available in the market contains_____________________?
The complex fertilizer Nitrophos available in the market contains_____________________?
A. 25%N & 23% P2O3
B. 46%N & 23% P2O3
C. 23%N & 23% P2O3
D. None of the above
Extraction of humic substance can be done by______________________?
Extraction of humic substance can be done by______________________?
A. NaOH
B. NH4Cl
C. NH4OH
D. None of the above
Who gave the defination of humic acid ?
Who gave the defination of humic acid ?
A. Gapon
B. Felbeek
C. Neir
D. Liekig